App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 505 · 40 questions

Developer's tip (Big and bold): Our rule: every button is at least 48 px tall. Missing px = 48 − height. Leave space between buttons; use clear words like Save or Send. Strong contrast (black on yellow, white on dark green) is easy to read; similar colours are hard.

1. 1.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
2. 2.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
3. 3.True or false: buttons almost touching is good button design. (a) False (b) True
4. 4.Which colour pair is hard to read? (a) dark blue on white (b) dark blue on black (c) white on black (d) black on yellow
5. 5.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) red on green (d) dark blue on black
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
7. 7.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) white on black (d) black on yellow
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
10. 10.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
11. 11.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) dark blue on black (d) white on dark green
12. 12.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.True or false: space between buttons is good button design. (a) False (b) True
14. 14.Which colour pair is easy to read? (a) black on pale grey (b) pale pink on white (c) dark blue on black (d) red on green
15. 15.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.True or false: strong colour contrast is good button design. (a) False (b) True
17. 17.True or false: space between buttons is poor button design. (a) False (b) True
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
19. 19.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
20. 20.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) black on pale grey (d) dark blue on white
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Next button: 60 px tall
    Save button: 68 px tall
    Back button: 36 px tall (a) Help (b) Next (c) Save (d) Back
22. 22.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Done button: 36 px tall
    Next button: 32 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Send button: 52 px tall
    Back button: 36 px tall (a) Send (b) Cancel (c) Back
25. 25.True or false: a tiny 20 px button is poor button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Start button: 68 px tall
    Save button: 56 px tall
    Send button: 32 px tall (a) Start (b) Done (c) Save (d) Send
27. 27.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Start button: 28 px tall
    Cancel button: 56 px tall (a) Cancel (b) Done (c) Start
29. 29.True or false: a big, easy tap area is poor button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Done button: 52 px tall
    Help button: 68 px tall
    Save button: 32 px tall (a) Cancel (b) Done (c) Help (d) Save
31. 31.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
32. 32.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) dark blue on black (d) yellow on white
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
35. 35.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Done button: 64 px tall
    Help button: 68 px tall (a) Help (b) Back (c) Done
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
39. 39.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Back button: 60 px tall
    Help button: 52 px tall
    Save button: 40 px tall

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